Well our internetz was not helping either too. Tried googling "Yukkuri how to" for the hell of it and it doesn't suggest anything beyond typing how... Just "Yukkuri" however suggests "shiteitte ne", "wiki", "lyrics"(wut???), and "fanfic".
Nitori will be since she might randomly decide its fun to see them suffer and not help nitori. But nitori is too cool to help...
Alas trolltori...may your trolling days follow you to the easy place in the sky or the uneasy place in the ground. Your memory will forever reside in all of us.